Paper machinery.



A. 1.v HAUG. PAPER MACHINERY. APPLICATION FILED SEPT-3,1914. `RIENEWED AUG. 5| 1915.

Patented June 6,1916.

3 SHEETS-SHEETI.

A. l. HAUG.

PAPER MACHINERY.

APPLICATION FILED sEPT13,1914. IIEIIEwED Aue.5.1915.

Patented June 6, 1916.

3 SHEETS-SHEET 2 mhufaesses:

a4/mmol Wajwp A. l. HAUG.

PAPER MACHINERY.

APPLICATION FILED SEPTA, 1914. IIENIiwED Aus. s, m5.

Patented June 6, 1916.

3 SHEETS-SHEET 3.

[Maen/iov. ,/'non JHaug;

.wigs

mimsses: (fd/wma( Wo.

UNITED sTATEs PATENT oEEicE.

ANTON J'. HAUG, OF NASHUA, NEW HAMPSHIRE, ASSIG-NOR TO IMPROVECD PAPER MACHINERY COMPANY, OF NASHUA, NEW HAMPSHIRE, A CORPORATION OF MAINE.

PAPER MACHINERY.

Specification of Letters Patent.

Patented June 6, 1916.

Application led September 3, 1914, Serial No. 860,089. Renewed August 5, 1915. Serial No. 43,887.

To all whom t may concern Be it known that I, ANTON J. HAUG, a subject of the Emperor of Germany, and a resident of Nashua, county of Hillsboro, and State of New Hampshire, have invented an Improvement in Paper Machinery, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to paper machinery and more particularly to improvements in machines for screening pulp.

One object of the invention is to provide a screen of greater eliciency than those heretofore in use.

Screens as heretofore constructed have consisted of unitary bodies provided with screening openings, through which the stock is forced from the interior of the screen drum. Owing to the diliiculty of keeping the openings clean, a large part of the screening area is lost after the screen has been in operation for a while and the screen is operated thereafter at a low efliciency.

The present invention contemplates the provision of a screen having screening openings which are automatically kept clean. In the preferred form of the invention this is accomplished by providing screening openings between relatively movable parts and utilizing the relative movement of the parts to effect the removal of such stock as cannot pass through the openings. A

A further object of the invention is to provide for the effective introduction within a screen drum of shower water or other liquid or semi-liquid material.

The invention will be best understood by reference to the following description when taken in connection with the accompanying illustration of one specific embodiment thereof, while its scope will be more particularly pointed out in the appended claims, it being understood that while I have shown my invention as applied to the centrifugal screen, it is in no wise limited thereto, but may beemployed in connection with screens 'of various types and construction.

In the drawings,-Figure 1 is a longitudinal sectional elevation showing a paper and pulp screen embodying one form of the invention; Fig. 2 is a transverse sectional elevation of the same screen taken on the specific embodiment of the invention which screen shown in Fig. l; and Fig. 6 is a sectional elevation of the spider shown in Fig. 5.

Referring to the drawings and to the is therein disclosed for illustrative purposes,

the screen which is herein represented as of 'l the rotary or centrifugal type is provided with a casing or housing 1 having the stock inlet 2, the outlet 3 for the screened stock and the outlet 4 for the tailings or waste. This housing incloses the operative parts of the screen.

The stock which is fed through the inlet 2 is carried through a stationary conduit 5 and deflected at one en d by the bell-shaped spreader plate 6 against the interior of a screen, the rotary parts of which are carried by the central longitudinal shaft 7. The latter is journaled in bearings 8 and 9 carried upon the brackets 10 and 11 respectively formed on or attached to the housing 1. A pulley 12 is mounted on one end of the shaft and may be belted to any suitable source of power to drive the screen at the required rate of speed.

Referring more particularly to Figs. 1, 5 and 6, the rotatable portion of the screen is made up of a series of spiders 13, 13a, 13b, etc the hubs 14 of which are keyed or otherwise iXedly secured to the drive shaft 7. At its periphery each spider has a narrow drum or ring-shaped formation 15, the ring portions 15 being narrower than the hubs 14, so that .adjacent rings are separated by circumferential openings. Thesesuccessive circumferential openings are each partly but not wholly closed by a ring formation 16vl` (see Figs. 1, 3 and 5) presented by the inner edge of an annular stationary plate or ring 100 17. The stationary, annular plates or rings 17 17a, 17", etc., are arranged in staggered or alternating relation with reference to the rotary spiders 13, being fiXedly secured to the four equally spaced rods 18 (see Figs. 1 and 2) which extend partly through and are fixed in the housing 1. The stationary rings 17 are held fixed on therods 18 with,

the rings 1G suitably spaced by means of the appropriately dimensioned bosses 19 (Figs. 1, 3 and 4) formed near the periphery of the rings. The fixed and the stationary rings are so arranged that each ring is spaced from its neighbor, and between the side of one ring and the side of the adjacent, relatively movable ring there remains a circumferential slot or screening opening, the size or width of which may be made anything whichmis required to obtain the proper screening. In the form of the invention shown, one wall of the circumferential screening opening is formed by a fixed body, to wit, the ixed ring 16 on the plate 17, and the other wall is formed by a rotating body, to wit, the rotary ring 15. The

y result is that as the stock is fed to the interior of the screen, the good material passes through the circumferential slots into the spaces between the plates 17, from which it drops into and passes through the stock outlet 3, while the tailings remain within the screen and are gradually passed through to the opposite end thereof and to the waste outlet 4.

The spiders 13 are provided with openings or cut-away portions 20 just inside of the rings 15, so as to provide amp1e spaces on the interior of the rotating part of the screen for the passage and circulation of the stock and tailings. Near the outlet end of the screen a rotary housing or chamber 21 is carried upon the hub 22 fixed to the driving vshaft 7, and closes that end of the screen. The stock is delivered to the interior of the chamber 21 and passes therefrom to the interior of the screen.

While the interior ofthe screen may be made cylindrical, if it be of the rotaryor centrifugal type herein illustrated and mechanical devices employed for moving the tailings toward the waste outlet, herein the fixed and rotary rings are made of decreasing diameter' toward the inlet end vof the screen, so that the screen body has a general conical shape. The inclination of the conical inside causes the stock as it is delivered to the chamber 21 to move to the interior of the screen and the unscreened portions thereof to move toward the large or delivery end. The outside spider or that of greatest diameter is formed with a cone-shaped flange 23 adapted to discharge the tailings into the waste chamber 24.

To supply the shower water to the inside of a screen, a plurality, herein two, shower pipes 25 are provided having lateral perforations through which the shower water may be discharged. These pipes are each held at one end in the smaller one of the rotary spiders and at the opposite end being fastenedv to andv communicating with the interior of the chamber housing 26. The pipes pass through openings 27 provided in the'spiders housing.

and together with the spiders and the housing 26 rotate with the driving shaft 7. The water is supplied to the interior of the housing 26 by means of the water supply pipe 27 and the stationary nozzle 28, from which water is delivered from the open end of the As'the latter rotates, the water is thrown by centrifugal force to the circumferential Vwalls of the housing and enters the shower pipes 25 from which it is supplied to the interior of the drum. This method of supplying the `shower water avoids the necessity of stuffing boxes and may also be used to distribute stock or other liquids or semiliquids to the interior of a screen.

While I have herein shown the screen as mounted upon a horizontal axis, it may be constructed to rotate about a vertical axis. Within the broad scope and purpose of my invention, I contemplate the provision of a screen provided with slots or openings, the walls of each slot oropening (if a plurality thereof be employed) being composed of opposing members, at least, one of which is movable so as to effect a clearing of the slots or openings as hereinbefore set forth and also a drawing of the fibers through said slots or openings. I am not limited to the use or employment of any particular number of slots or openings, one only of which may be employed within some aspects of the invention. By providing a. screen composed of opposing members, preferably spaced so as to provide a slot or slots, I effect a drawing action of the fibers before they enter the slots and also in their passage therethrough. I thereby effect a displacement of the individualy fibers from the body or mass thereof.

While I have herein shown and described one form of the invention for illustrative purposes, it is to be understood that the same is not limited to the specific form or relative arrangement of parts herein shown, but that extensive deviations may be made without departing from the spirit of the invention.

Claims:

1. In an apparatus of the class described a screen comprising alternately fixed and movable members separated by circumferential slots, a stock inlet communicating with the interior of the screen, a screen-stock outlet communicating with the exterior thereof, and an outlet for the tailings also communicating with the interior of the screen.

2. In paper manufacture, a centrifugal screen having circumferential screening slots for the stock to pass from the interior to the exterior of the screen, said slots being formed between relatively movable parts.

3. In paper manufacture, a centrifugal screen having a plurality of relatively movable, adjacent parts separated by circumferential screening slots. l

4:. In paper manufacture, a centrifugal I from.

. screen having a plurality of circumferential 6. In paper manufacture, a centrifugal screening openings, and means located within said screening'openings for keeping the I same clean.

7. In paper manufacture, a centrifugall screen having a plurality of lopenings and'. members circumferentially arranged in said openings but spaced from the walls thereof, said members being movable relatively to said screen.

8. In paper manufacture, a centrifugal screen comprising a rotating member, a series of spiders mounted to rotate therewith, said spiders having their peripheral portions separated by` circumferential openings,fand a series of annular plates located insaid openings and providing screening slots between the plates and the adjacent walls of the spiders.

9. In paper manufacture, a centrifugal screen consisting ofa plurality of ringshaped members of increasing diameter from'.

end to end, means for rotating said members together, al series of ring-shaped members located between the successive rotating ring-v 4shaped members but spaced` therefrom to' leave circumferential screening openings, a stock 1nlet communlcatlng with the interior of the screen at the smaller end thereof, a

screened-stock outlet communicating with the exterior thereof and a waste outlet communicating with the interior of the screen at the larger end thereof.

10. Inv paper manufacture, the cornbina-4 y tion with a vcentrifugal.'screen''of a liquid feeding device connectin'gfwith the interior thereof comprising liquid discharge means' within the screen,a rotatable housing' communie-ating with vsaid discharge meansyand `stationary water supply meansfor delivering water to said housing. A, Y .j l1, In an apparatus oftheclass' described,

a screen having a series of'slots or' openings,

the walls of each opening 'being com-posed of two members fat least one of lwhich is movable, meansl forl supplying stock .to the screen,

a screen having a series of slots or'o'penings, the Wallsof each openingl being composed of two members, one ofwhich -i's fixed and the other.. ofwhich is movable, jmeans for .sup-

a'lld means fOr .discharging the screened ma- .terialand the tailings.y Y

l '65 12;-111 an 'apparatusoftheclass described, y

plying stock-1to.'..the"screen,j and means-for discharging ythe .screened material Aand the tailings. l 1

13. In an apparatus 'ofthe class described, 'I l a screen comprising 'alternately xed'and movable members separated by slots, a stock inlet screen, a Screen stock outlet, and an outlet for the tailings, all communicating with'said screen. f i

' 14., In an apparatus ofthe described,

a screen havinga slot or opening, the` walls thereof being composed of two'members at vleast one of which is movable, therebyl to keep the slot lclean and to draw the fibers therethroughymeans for supplying stock to` the screen,'and means;` for dischargingthe screened material :and the tailings.

A 15. In an apparatus of the class described, a screen having a plurality v.of members. to 1 effect drawin action'upon thebers and to separate indlvidual fibers from the mass thereof, at least lone-of said-members being movable, means for supplying stock to the screen, and means for discharging -the screened material andthe tailings.

name to this specification in the two subscribing witnesses. L

vANTON J, lamine.y

A lIn testimony whereof Ihave signed.- my

presence of 

